noun
Definition: A device used to close or open an opening, like a bag or clothing, by sliding a tab that connects two rows of interlocking teeth.
Example: I need to fix the zipper on my jacket because it keeps getting stuck.
transitive verb
Definition: To fasten or unfasten something using a device that consists of two strips of fabric with interlocking metal or plastic teeth.
Example: She zipped up her jacket before going outside.